util: when creating temporary file names, allow including extra id string in it

This adds a "char *extra" parameter to tempfn_xxxxxx(), tempfn_random(),
tempfn_ranomd_child(). If non-NULL this string is included in the middle
of the newly created file name. This is useful for being able to
distuingish the kind of temporary file when we see one.

This also adds tests for the three call.

For now, we don't make use of this at all, but port all users over.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index a2eb435fce..40bea87dfa 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -5687,7 +5687,7 @@ static int create_edit_temp_file(const char *new_path, const char *original_path
         assert(original_path);
         assert(ret_tmp_fn);
 
-        r = tempfn_random(new_path, &t);
+        r = tempfn_random(new_path, NULL, &t);
         if (r < 0)
                 return log_error_errno(r, "Failed to determine temporary filename for \"%s\": %m", new_path);